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Article

Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source

1
Istituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN-LNS), Via S. Sofia 62, 95123 Catania, Italy
2
Dipartimento di Ingegneria Elettrica, Elettronica e Informatica, Università degli Studi di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
*
Author to whom correspondence should be addressed.
Telecom 2021, 2(1), 42-51; https://doi.org/10.3390/telecom2010004
Received: 30 December 2020 / Revised: 29 January 2021 / Accepted: 2 February 2021 / Published: 8 February 2021
The design of a microwave antenna sustaining a high-energy-content plasma in Electron Cyclotron Resonance Ion Sources (ECRISs) is, under many aspects, similar to the design of a conventional antenna but presenting also peculiarities because of the antenna lying in a cavity filled by an anisotropic plasma. The plasma chamber and microwave injection system design plays a critical role in the development of future ECRISs. In this paper, we present the numerical study of an unconventionally shaped plasma cavity, in which its geometry is inspired by the typical star-shaped ECR plasma, determined by the electrons trajectories as they move under the influence of the plasma-confining magnetic field. The cavity has been designed by using CST Studio Suite with the aim to maximize the on-axis electric field, thus increasing the wave-to-plasma absorption. As a second step, an innovative microwave injection system based on side-coupled slotted waveguides is presented. This new launching scheme allows an uniform power distribution inside the plasma cavity which could lead to an increase of ion source performances in terms of charge states and extracted currents when compared to the conventional axial microwave launch scheme. Finally, the use of both the “plasma-shaped” cavity and the microwave side coupled scheme could make the overall setup more compact. View Full-Text
Keywords: slotted waveguide antenna; waveguide coupler; wave-plasma coupling; resonant cavity; Electron Cyclotron Resonance Ion Sources (ECRIS) slotted waveguide antenna; waveguide coupler; wave-plasma coupling; resonant cavity; Electron Cyclotron Resonance Ion Sources (ECRIS)
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MDPI and ACS Style

Mauro, G.S.; Torrisi, G.; Leonardi, O.; Pidatella, A.; Sorbello, G.; Mascali, D. Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source. Telecom 2021, 2, 42-51. https://doi.org/10.3390/telecom2010004

AMA Style

Mauro GS, Torrisi G, Leonardi O, Pidatella A, Sorbello G, Mascali D. Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source. Telecom. 2021; 2(1):42-51. https://doi.org/10.3390/telecom2010004

Chicago/Turabian Style

Mauro, Giorgio Sebastiano, Giuseppe Torrisi, Ornella Leonardi, Angelo Pidatella, Gino Sorbello, and David Mascali. 2021. "Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source" Telecom 2, no. 1: 42-51. https://doi.org/10.3390/telecom2010004

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